From: Christopher Kings-Lynne <chriskl@familyhealth.com.au>
To: Gunther Schadow <gunther@aurora.regenstrief.org>
To: pgsql-sql@postgresql.org
Subject: Re: Possibility of Index-Only access in PostgreSQL?
Date: Thu, 27 Jun 2002 11:51:25 +0800
Message-ID: <007c01c21d8d$e94e9230$0200a8c0@SOL> (raw)
References: <3D19FFCF.8030800@aurora.regenstrief.org>
> - Oracle is content with data read from an index if that is all that's
> needed. Indeed, I only need bar and baz and those are in the index.
> The benefits of not having to seek the scattered rows from the data
> table saves 35000 back and forth head movements / seeks.
Postgres can't use the data from its indices, because of the MVCC mechanism.
Maybe you should try CLUSTERing your table to improve performance???
Chris
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To: pgsql-sql@postgresql.org
Cc: chriskl@familyhealth.com.au, gunther@aurora.regenstrief.org
Subject: Re: Possibility of Index-Only access in PostgreSQL?
In-Reply-To: <007c01c21d8d$e94e9230$0200a8c0@SOL>
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